Sophie, Mia and Ava have some marbles.
Sophie has eight times as many marbles as Mia.
Ava has three-quarters as many marbles as Sophie.
Write down the ratio of Sophie's marbles to Mia's marbles to Ava's marbles.
64 exam-style questions on Edexcel GCSE Maths Writing and Simplifying Ratio. Each one has a worked solution and a mark scheme showing where the marks go.